Nanofiltration

We propose in this study the effectiveness of an organic membrane Nanomax50 charged negatively on complex solution tanneries. Our choice was made on the solutions of tanning and liming of the tannery tawing of Rouïba/Algiers because of the nature of the substances which they contain, namely chromium

The problems involved in the environment for a surface treatment are especially at the level of water and even dangerous often toxic waste for the environment. The purpose of the surface treatments is to make acquire on metal or plastic surfaces new properties by a surface dressing of material. In t

Occurrence of organic micropollutants in surface water, and thus potential drinking water supplies, raises concerns about the safety of the drinking water. Nanofiltration has been proposed as a potential technology to remove micropollutants. The removal efficiency with nanofiltration depends on the

The parameters of the model comprising the polarization layer and the Spiegler–Kedem–Katchalsky model of membrane transport were determined for a series of nanofiltration membranes. Membranes with different NaCl retentions were chosen. The experiments were performed at the same hydrodynamic conditio

The membrane technique of nanofiltration (NF) was used to carry out partial demineralization of whey and milk ultrafiltration permeate (MUP). The experiments were carried out in a completely automated NF pilot plant. An aromatic polyamide spiral-wound membrane supplied by Osmonics (USA) was selected

Red wine contains many compounds which have a beneficial effect on human health. The aims of this study were to concentrate the valuable components of wine by nanofiltration, to describe the mathematical model of the permeate flux and to estimate the cost of the process. Laboratory-size equipment wi

Nanofiltration is an effective technique in improving the organic matter removal from coagulated surface water, but the process should also be economically feasible and environmentally sustainable when applied. Cost and environmental impact of nanofiltration installed after conventional surface wate

The main objective of this work was to study the effect of salt concentration and pH on the surface charge of loose nanofiltration (NF) membranes through streaming potential measurements. A Dow pilot unit equipped with a plate-and-frame module allowed the simultaneous test of two commercial NF membr

Although pre-treatment of membranes is often used to ensure the reliability of experimental data, it also has the potential to improve many aspects of membrane performance. This study investigates the influence of chemical pre-treatment and wetting on membrane flux and retention. The results show th

A mass transfer coefficient determination method, based on the velocity variation method, is developed for pressure-driven membrane modules with large membrane area and high recovery rates. The method was used to measure mass transfer coefficients in the nanofiltration spiral-wound module Filmtec NF